How long are people contagious? - CTE Online

This virus is very contagious and can spread quickly in these settings. Is the virus contagious? ... There are many different strains of norovirus, which makes it difficult for a person to become immune and they can become sick more than once. Some persons develop more severe illness than others because of differences in the virus and a person ... ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download